6、conquer 征服;占领
7、because of 因为,由于
because of 是介词短语,后面跟名词、代词、动名词或名词性从句。而because是连词,后面跟句子,引导原因状语从句。
He came to work late because of getting up late.
He came to work late because he got up late.
他因为起床晚了,所以上班迟到了。